One big difference between SkimLinks and VigLinks, however, is that once you’re approved by the company, you can choose to work with any merchant or program on its platform. SkimLinks has also published a white paper discussing its partnership with Buzzfeed, giving SkimLinks a lot of credibility. SkimLinks also has a higher tier of vetted merchants called “Preferred Partner” and “VIP” that both pay higher commissions than standard merchants.
Some advertisers offer multi-tier programs that distribute commission into a hierarchical referral network of sign-ups and sub-partners. In practical terms, publisher "A" signs up to the program with an advertiser and gets rewarded for the agreed activity conducted by a referred visitor. If publisher "A" attracts publishers "B" and "C" to sign up for the same program using his sign-up code, all future activities performed by publishers "B" and "C" will result in additional commission (at a lower rate) for publisher "A".